Tire-valve cap.



M. F. PATTON.

TIRE VALVE CAP.

APPLICATION HLED DEC. 10. 1914.

Patented Nov. 30, 1915.

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TIRE-VALVE car.

Specification of Letters Yatent.

Application filed December 10, 1914. Serial No. 876,399.

To (all fr/wm 2'25 may wmi/ crn Be it known that l, Iii'os'ss F. PA'ETON, a citizen of the l'nited States, residing at Tuscaloosa, in the county of Tuscaloosa and State of Alabaiinn have invented certain new and useful linp oi'cn'ients 1X1 lirevalve 'Laps, of which the following is a specification. I

My invention relates to an improvement in caps for the valves of pneumatic tires and for other like devices, and has for its object to provide a cap winch performs all of the functions required of the present type o't screw caps and yet is much more quickly and easily detachable for the purposes ot permitting the tire to be inflated or deflated or to test the air prossuie there n.

The valves of the inner tubes of pneu-v matic tires, according to the present practies, are passed through a suitable opening in the wheel rim, the stems being threaded throughout their length and adapted to be engaged by an internally threaded cap which requires considerable time and trouble to screw it on and oil, which has to be done 'wlieneier access is to be had to the valve.

for any purpose, i

X E i ccoioing to my inien ion. su. Li /1M3 the cap into two members, one being a titbular base member which is suitsbly'held against the wheelv rim and 'Wl'iich'is pro vided with a tubular shank that has an intermediate reduced portion and is short enough to permit the upper end of the valve stem to project above it and yet is loiig enough to receive the quick detachable cap member that is preferably heldthereoii by a friction packing ring which expands iiito said reduced portion on the extensioiilancl holds the cap noiseless in place, perfectly guards against dust, and permits thefree approa'chand rein oval of the cap.

My invention further comprises the details of construction and arrangements of view of a removable cap member; and Fig.

3 is a detail view of the base member;

Similar reference numerals refer to simij' lar parts throughout the (lrawings.

Iliave shown what. l regard asthe pre-' Patented Nov 30, 1915. l

ferre'd embodiment of my inventionap-- plied toan automobile wheel comprising a hub 1, an inner tube 2 having an externally threaded valve stem 3, and a cap 4: on the,

stem, all of which parts are of standard d'esign. -I provide a cap member 5 for protecting the valve stem, which member is provided at its open end with a shoulder which has airinternal circumferential channel that receives a compression ring pack-1 mg '4", which packing is adapted to project;

slightly above the inner wall of the cap.

The base member 8 is internally threaded and adapted to screw down over the valve.

stem 3 and has itsiinderface' chambered to receive a washer 9 and compress it against the wheel rim 1. A tubularcylindrical stud is formed integ'al with'tlie base member, 8 and comprises an intermediate contracted portion 10 and an enlarged head portion" 11. ri bevel face 12 connects the* arts'lO mid 11, which latter has itscute'r en l2'also beveled at 13. The diameter of the head 11 I is such as to cause it to fit-snugly into the base of the cap 5. The'obje'ct of this isto require a substantial'; compression of j the packing ring 7 whenit lie cap is forced over the head 11 so thatwhen the packing 93- panels against the reduced portion 10 of the stud, it will hug the latter closely.

Preferably the head 11 makes so tight. fit in the cap 5 thatian air pack will arise between thepaeking 7 on one side aiigl the Joint bee tween the head and the ea'p on. the other that will assist in resistii gthe displacement of.

the cap by sudden jars.

A in practice, after the base member 8 has been screwed down on the stem for which purpose its periphery is knurled, thecap 5 can be mounted by forcing its end over the head ii, in doing which the beveled end 13,

of the head compresses the packing 7. Whenthe latter comes opposite the reduced inter-- mediate portion 10, it expands and engages the latter. To test the airpressure or pump up the tire\it is. only necessary to-grasp the cap 5 firmly ahd draw it slowly oil the stud, which can 3 done easily and without appreciable trouble or loss of time, and, by reason of the fact that the parts 10 and 11 of the base are joined by a beveled face '12,

the packing will 'ride up the latter without being pulled or torn.

While I have described my invention with particular reference to its application to an automobile tire valve, 1 do not desire to limit its use to that particular purpose nor dol dev.ters Patent, is

sireito limit myself to the exact details of construction or thearrangen'ienufimf parts shown, but to claim such reasonable lhanges 1., In a quick detachable mounting for dust caps, in combination, a base member adapted to screw on the valve stem, a reduced' tubular extension on said member having an annular intermediate grooved portion, and a cap member having a solid ring packing of compressible material seat ed firmly ,in its bore near the open end thereof, which packing projects into said bore and is adapted to be compressed. by said entering tubular extension and to expand' with a close packing engagement into said grooved portion to detachably hold the cap in engagement with the base member.

112. In a quick detachable mounting for dust caps, in combination, a base member adapted to screw on the valve stem, a tubular extension on said ineinbei; having an annular intermediate groove, a cap member having an annular groove in its bore near the open end thereof, and a ring packing of compressible materialadapted to be received in and to expand into the spaceof saidrcgistering grooves to detachably hold the parts assembled and paclc the joint be tween them, one of the grooves having ring retaining end walls while the other groove has a beveled end wall up which said packing rides as th cap is detached.

3. in a quick detachable mounting for dust caps, in combination, a base member comprising a nut having in its bottom face .a washer seat and at the center of its flat top face a. reduced tubular cylindrical extension, the outer end oi which is enlarged and has its annular end walls beveled, and a top member having at its open end a smooth bore which is adapted to lit tightly over said enlarged end of said extension and which has an'annular groove therein with its annular end walls substantially parallel, and an annularcompressible packing held seated in said groove and projecting into the bore in said cap and adapted to be 00111 )I'GSSQtl into its seat when engaged by either beveled end wall of said enlarged end of said tubular extension, and to resiliently oppose the attachment or dctzurlnucnt of said cap member to or from said base member.

In testimony whereof I 'ailix my signature in presence oi two witnc. MUSlto l PATTON- Witnesses WM. H. ORR, W, l/Vu MCLNTYRE. 

